Dow Corning
Dow Corning 4045031 Silicone Sealant 10 oz Cartridge Aluminum Gray
Silicone sealant in a 10 oz cartridge, UV-resistant and flexible from -40 to 350 °F, FDA-compliant for food-grade use
- FDA-compliant for food contact per 21 CFR 177.2600
- Withstands -40 °F to 350 °F continuous exposure
- UV-resistant silicone stays flexible after full cure
- 600 % elongation absorbs joint movement without cracking
- 25-minute working time allows precise tooling
Product Identity
DOWSIL 4045031 Silicone Sealant is a 10 oz cartridge formulated for HVAC, duct and electrical sealing tasks. It bonds to ceramic, fiberglass, glass, metal, plastic and porcelain while meeting FDA 21 CFR 177.2600 food-grade requirements. The aluminum-gray colour suits visible joints where appearance matters.
Thermal Range and Cure
The sealant remains flexible across a service window from -40 to 350 degrees F and resists ultraviolet exposure without degrading. A 25-minute working time allows tooling before the material skins over, and full cure is reached within one day at standard conditions. Elongation of 600 percent accommodates joint movement without cracking.
Upgrade Context
This cartridge replaces generic caulks that lack food-grade certification or UV stability for long-term outdoor or ductwork duty. The jump is worthwhile when a specification calls for FDA compliance, wide temperature performance or proven adhesion to mixed substrates. It is not suited for structural bonding, high-pressure containment or applications requiring a paintable finish.
Highlights
- FDA-compliant for food contact per 21 CFR 177.2600
- Withstands -40 °F to 350 °F continuous exposure
- UV-resistant silicone stays flexible after full cure
- 600 % elongation absorbs joint movement without cracking
- 25-minute working time allows precise tooling
Specifications
| Brand | DOWSIL |
|---|
Questions about this item
How do I install the 10 oz cartridge and what step do people often skip?
Load the cartridge into a standard caulking gun, cut the nozzle tip at a 45-degree angle for the desired bead size, and apply within the 25 min working time. The step often skipped is tooling the bead immediately after application to ensure full surface contact before the silicone skins over.
What maintenance or replacement will this sealant need over time?
The cured silicone remains flexible at 600 percent elongation and resists UV degradation, so it does not require routine maintenance. Replacement is only necessary if the joint is physically damaged or if the substrate fails, as the material is rated for continuous service from -40 Degrees F to 350 Degrees F.
What is the first limitation that appears during sustained high-temperature exposure?
The maximum performance temperature is 350 Degrees F. Beyond this point the silicone can begin to degrade, losing its flexible seal properties before any other characteristic such as UV resistance or elongation becomes the limiting factor.
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